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kotlinlang

is it true that not fully implementing a Kotlin interface in swift generates a compile time error, but not fully implementing an abstract base class only generates a runtime error when you try to call an unimplemented abstract function? is there a way to move that error into build time?

hmm maybe i can just replace `abstract class` with `interface` and refactor its constructor? because interfaces can implement methods?

hmm i tried moving an abstract fun definition into a parent interface, but the swift still compiles without implementing that method

switching to an interface feels like a bad compromise. calling unimplemented abstract methods should produce a build error.

Unfortunately, interoperability between Kotlin and Swift currently works through Objective-C layer, and the latter doesn’t have a notion of abstract methods. So it doesn’t seem possible to produce a build error here.